Improvement in grain-driers



* UNITED STATES PATENT OF ICE.

KARL SOHROLL, OF CHICAGO, ILLINOIS.

IMPROVEMENT lN GRAIN-DRIERS.

Specification forming part of Letters Patent No. 180,071, dated July 18,1876; application filed June 1, 1876.

To all whom it may concern: 7

Be it knownthat I, KARL ScHRoLL, of Chicago, in the county of {look andState of Illinois, have invented an Improvement in Grain-Driers, ofwhich the following is a specification:

The nature of my invention relates to an improvement in grain-dricrs ofthat class wherein a thin descending sheet of damp grain is subjected tothe desiccating effects of currents of heated air passing through thesheet of grain and the invention consists in the peculiar constructionand arrangement of two concentric perforated cylinders and a diaphragmin a closed chamber, containing in its lo\\'(r part an opencharcoal-furnace, the whole being arranged to operate as more fullyhereinafter set forth.

Figure l is a perspective view, showing the interior of the dryingchamber and apparatus. Fig. 2 is a transverse vertical section of thesame. Fig. 3 is a horizontal section at war. Fig. 4 is a plan of thespoutvalve, being a section at y y.

In the drawing, A represents the dryingchamber, having across it, abovethe middle, a diaphragm, B. The top 0 of the chamber may form the bottomof an elevated grainbin, and has a flaring opening, from which issuspended a perforated sheet metal cylinder,

D, which passes through the diaphragm B, its lowerend being conical, andterminating in a lateral discharge spout, D in the upper partof whichthere is a circular valve, a, centrally pivoted to a plate, I), in thebottom of the cylinder, both of which are perforated with a row of holeson the same radius. The holes in the valve may be brought coincidentwith those in the plate, and the valve may be adjusted to regulate orshut off the outflow of grain.

D is an inner cylinder, suspended concentrically within the cylinder D,and is, like the other, finely perforated. It is closed at the top by animperforate conical deflector-cap, as seen in Fig.2. Eis a short flue,suspended at its flaring head concentrically in the cylinder D, accessto the lower part of which is had by two lateral flues, E. F is abrazier, or open charcoal-furnace, in the lower part of the chamber,covered by a projecting hood, F, to prevent the escape of sparks fromthe snapping of the fuel. 0 c are outlets for the air-currents in theupper part of the chamber.

The operation is as follows: The space loctween the cylinders is filledwith descending grain, in a thin sheet,,whose outflow is regulated bythe valve. The heated air and gases from the brazier rise until arrestedby the diaphragm, when a portion will pass through the fines E E E intothe upper part of the inner cylinder, thence out through theperforations and the annulus of grain into the upper part of thechamber, finding an exit at the openings 0 c. The remainder will passthrough the perforations of the lower part of the cylinders and theinterposed grain, and rise around the flue E until above the diaphragm,when they will pass out through the grain in like manner, absorbing itsmoisture in passing through it.

What I claim as my invention is In a grain'drier, substantially asdescribed,

the combination, with the chamber A, having an open brazier, F, at thebottom, of the pen forate'd concentric cylinders D D, titted with thespout D valve to, flues E E, and the diaphragm B, substantially as andfor the purpose set forth.

KARL SOHROLL.

Witnesses:

WM. H. LOTZ, EMIL H. FROMMANN.

